So, neck has 6 coats of full strength true oil and is, I think, looking pretty good. There are a pair of dings on the back of the neck, no idea how they got there, and a bit of splitting around the tuner holes but otherwise I think this is shaping up nicely. Very smooth and shiny:

The fretboard though has never recovered from the initial masking-tape balls up:

That's never going to look right, but giving it a matt finish will make it a little less obvious.
The body's had 4 coats but at some point we had a breezy day and the finish has picked up a load of dust particles:

Hopefully the next round of sanding will lift those off easily enough. I was going to put another couple of coats on before hitting the 600 grit but given this I'm thinking I'll do that now.
Finally, replacement knobs and truss rod cover, still a bit to do on these but I think they'll shape up ok in time. Not sure whether to go with a gloss, matt or satin finish.

Decisions decisions...